Multistage pump mainly assembled by suction casing, discharge casing, stage casing, impeller, shaft, bearing and mechanical seal or packing seal.
1.Impeller is the main part of multistage pump.Before assemble, the impeller should be static balanced. The inner and outer surfaces of the impeller should be smooth enough to reduce the frictional loss of water flow.
2.The suction casing, stage casing and discharge casing also called pump casing, the function of them are support and fix, connected with the bearing base.
3.The role of the pump shaft is connected to the motor by a coupling, pass the motor torque to the impeller, so it is the main component of mechanical energy transmission.